HBW 3, p. 668
- Medium-sized rather aerial waterbirds, with long, pointed wings and short legs; unique bill structure, with very narrow lower mandible much longer than upper.
- Pantropical, extending to subtropics and marginally into temperate zone.
- Large rivers and other water bodies, mainly inland.
- 1 genus, 3 species, 5 taxa.
- 1 species threatened; none extinct since 1600.
List of species:
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